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The paper describes the effect of cutting parameters and tool geometry on the surface quality after machining of anAl/
CFRP(aluminium alloy/ Carbon Fibre Reinforced Plastics) sandwich structure.Atwo-layer sandwich structure made
of an EN AW 2024 aluminium alloy and Carbon Fibre Reinforced Plastics (CFRP) was examined. The experiment
used the process of peripheral milling. The experiment investigated the effects of cutting speed (v c), feed per blade (fz)
and helix angle (λs) on surface quality as defined by differences in the height of materials. It was also analysed how
the machining conditions described above affected the values of cutting force components. In the experimental stage
of the study, uncoated, double-bit carbide mill cutters with working diameter Dc = 12 mm and a variable helix angle
(λs = 20 °, λs = 35 °, λs = 45 °) were used. The results have shown that cutting parameters and tool geom-
etry do affect the surface quality and cutting forces after milling of the sandwich structure. The low-
est material height difference was achieved when machining with the helix angle λs = 45 °, cutting speed
vc = 300 m/min and feed per blade fz = 0.08 mm/blade. The highest material height difference occurred after ma-
chining under the following conditions: vc = 300 m/min, fz = 0.08 mm/min, λs = 20°. The minimum cutting force
value was obtained for cutting parameters: vc = 80 m/min, f z = 0.08 mm/blade during milling with the helix angle
λs = 45°. The maximum cutting force was recorded during machining with the helix angle λs = 20 ̊, cutting speed
vc = 400 m/min and feed per blade f z = 0.08 mm/blade.
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